How do I change the keyboard shortcuts for Windows Sidebar?

I’ve recently moved onto Vista from XP and I’ve come across an annoying little problem. Whenever I use the windows key + space bar the Sidebar is brought into focus.

I want to change this keyboard shortcut as I’m used to having Launchy set to that shortcut and Launchy won’t let me use that shortcut as it warns me that it’s bound to another application.

So, does anyone know how to change the keyboard shortcuts for the sidebar? After much googling I haven’t been able to find any info.